Windows Server, version 1803 will reach the end of servicing on November 12, 2019. This applies to the following editions of Windows Server released in April of 2018:

Windows Server, version 1803, Datacenter edition

Windows Server, version 1803, Standard edition

These editions will no longer receive security updates after November 12, 2019. Customers who contact Microsoft Support after this date will be directed to update their device to the latest version of Windows Server to remain supported.